How far could you take your FD with the combination of: Stock ECU, APEXi S-AFC, APEXi AVC-R. As far as I know, this combo has no control of the actual fuel mapping of the motor, correct? So to what point would this set up stop being able to keep up with a modded engine? Would a fix be to get the HKS AIC-Si? Any benefits compared to just getting the APEXi Power FC?